DTMF Class

public class DTMF

Public Class DTMF

public ref class DTMF

type DTMF = class end

GSF.Media.Sound.DTMF = function();

Type.createClass(
	'GSF.Media.Sound.DTMF');

using System;
using GSF.Media;
using GSF.Media.Sound;

static class Program
{
    static void Main()
    {
        WaveFile waveFile = new WaveFile(SampleRate.Hz8000, BitsPerSample.Bits16, DataChannels.Mono);
        double volume = 0.25D;  // Set volume of tones to 25% of maximum
        DTMF tone;

        // Get the dial tone dual-frequencies
        tone = DTMF.DialTone;

        // Change the duration of the dial-tone to 3 seconds
        tone.Duration = 3.0D;

        // Generate a dial tone
        DTMF.Generate(waveFile, tone, volume);

        // Generate a busy-signal tone, repeat four times
        DTMF.Generate(waveFile, DTMF.BusySignal, volume, 4);

        // Generate an off-the-hook tone, repeat eight times
        DTMF.Generate(waveFile, DTMF.OffHook, volume, 8);

        // Get the EBS Alert dual-frequencies
        tone = DTMF.EmergencyBroadcastSystemAlert;

        // The official duration of an EBS Alert is 22.5 seconds, but
        // the noise is rather annoying - so we set it to 4 seconds
        tone.Duration = 4.0D;

        // Generate the EBS Alert noise
        DTMF.Generate(waveFile, tone, volume);

        // Play all the generated tones
        waveFile.Play();

        Console.ReadKey();
    }
}